$7\right)$ $7$ If the axes are rotated through an angle of $30^{°}$ then the coordinates of $\left(2\sqrt{3.4\right)} $ $10$ the new system are $1\right)\left(-2.3\sqrt{3\right)} $ $2\right)\left(1$ $-3\sqrt{3\right)} $ $3\right)\left(1.3\sqrt{3\right)} $ $4\right)\left(2.3\sqrt{3\right)} $ $1$ $2$